Right so in the example you gave, replace "Account" with "Distance" and "Member" in the fix statement with "Entity" and then in the formula replace "Member" with the entity you want to copy. Basically you're saying, for all entities I fix on, set "Distance" equal to the "Distance" for the Entity that I input to.

Can you post the code that you used? Also, be sure to make sure that this isn't a block creation issue. You may want to try and copy data into the cells first, then run the rule to confirm that it is not a block creation problem.